论文部分内容阅读
通过硬度测试、金相组织观察,研究分析了铝合金压铸模发生早期龟裂失效的原因。结果表明,压铸模的失效原因主要是电加工导致的缺陷、材料热处理工艺不当、以及金属液的冲击等。通过热处理工艺及加工工艺优化,将压铸模设计硬度(HRC)降低为46~47,对应的热处理工艺调整为480、700、850℃分级加热+1050℃真空油淬+600℃二次回火,合理预热压铸模,定期进行退火处理等,提高了铝合金压铸模的使用寿命。
Through the hardness test and microstructure observation, the reason of early failure of aluminum alloy die-casting mold was analyzed. The results show that the main reasons for the failure of the die-casting mold are defects caused by electric machining, improper material heat treatment process, impact of molten metal and the like. Through the optimization of heat treatment process and processing technology, the design hardness (HRC) of the die-casting mold is reduced to 46-47, the corresponding heat treatment process is adjusted to 480,700,850 ° C, the staged heating + 1050 ° C vacuum oil quench + 600 ° C secondary tempering, reasonable Preheating die-casting mold, regular annealing, etc., to improve the service life of aluminum die-casting mold.